This article originally appeared on Undark. In theory, Alice Weisz retired in 2016. But in practice, the retired endocrinologist in Virginia Beach has had a busy year. Last January, as Covid-19 reached the U.S., Weisz volunteered to help the local health department field phone calls. By late spring, she was sliding swabs up people's nostrils at drive-through Covid-19 testing sites. In the fall, Weisz administered flu shots. And earlier this month, she found herself in the vacant ambulance bay of a Virginia Beach emergency medical services facility, giving shots of the Moderna Covid-19 vaccine to a roster of essential workers: a nurse, a dental assistant, a mortician. People "want it on video, they want their picture taken that they're getting the vaccine," she said. "Everybody's feeling, '